The excellent white paper "Configuring Outlook Profiles by Using a PRF File" at http://office.microsoft.com/search/redir.aspx?assetid=HA011403051033&QueryID=pHm
7c_60I&respos=3 explains how to use the ImportPRF registry value to force Outlook to process a prf file at startup.

Signature
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> When you use a PRF File to Open Outlook you will always receive a Window
> stating:
[quoted text clipped - 8 lines]
>
> Thanks for your help in advance...